Publications de Rolf Wüthrich

Toward a better understanding of glass gravity-feed micro-hole drilling with electrochemical discharges

Spark-assisted chemical engraving (SACE) is a flexible, simple and inexpensive method for machining electrically non-conductive materials. SACE is particularly interesting because of the high drilling speed that can be achieved compared to other micromachi ...

Institute of Physics2009

Estimation of the effectiveness factor of an outer-sphere redox couple (Fe3+/Fe2+) using rotating disk Ti/IrO2 electrodes of different loading

Christos Comninellis, György Foti, Rolf Wüthrich, Erika Herrera Calderon

Springer Netherlands2009

Effectiveness factor of fast (Fe3+/Fe2+), moderate (Cl2/Cl-) and slow (O2/H2O) redox couples using IrO2 based electrodes of different loading

Christos Comninellis, György Foti, Rolf Wüthrich, Erika Herrera Calderon

Springer Netherlands2009

Control of a Haptic Interface and a Micromachining Setup with an Open Source Real-Time System

Hannes Bleuler, Rolf Wüthrich, Evren Samur, Lionel Flaction, Ulrich Spälter, Pascal Maillard

Open source software have evolved into powerful tools for real-time control of mechatronic systems. They are of interest for academic purposes, as they promise high flexibility at low cost. In this paper, we investigate the performance of an open source co ...

2007

Effect of microstructure on the electrochemical behavior of Pt/YSZ electrodes

Christos Comninellis, György Foti, Rolf Wüthrich, Arnaud Jaccoud

Springer, Springer-Verlag2007

The current signal in Spark Assisted Chemical Engraving (SACE), what does it tell us ?

Hannes Bleuler, Rolf Wüthrich, Ulrich Spälter

Spark-assisted chemical engraving (SACE) is a promising micro-machining technology for the low-cost machining of holes and channels in non-conducting materials, such as glass and some ceramics. Despite the complexity of SACE due to the interdependency of t ...

2006

A systematic characterization method for gravity-feed micro-hole drilling in glass with spark assisted chemical engraving (SACE)

Hannes Bleuler, Rolf Wüthrich, Ulrich Spälter

Gravity-feed drilling is the most commonly used method for micro-hole drilling in glass with spark assisted chemical engraving (SACE). This paper proposes a method allowing the systematic characterization of this drilling method. The influences of voltage, ...

2006

The gas film in Spark Assisted Chemical Engraving (SACE) - A key element for micro-machining applications

Rolf Wüthrich

Machining of various electrically non-conductive materials is possible with Spark Assisted Chemical Engraving (SACE). Even though this technology presents several interesting properties like simplicity, flexibility and the possibility to obtain very smooth ...

2006

Electrochemical characterization of mechanically implanted boron doped diamond electrodes MI-BDD

Christos Comninellis, Rolf Wüthrich, Agnieszka Kapalka

A new, low production cost, technique for the preparation of boron-doped diamond electrodes (BDD) is presented. The technique is based on mechanical implantation of BDD particles into a titanium substrate. The electrochemical characterization of low covera ...

Elsevier2006

Spark Assisted Chemical Engraving (SACE) machining – a versatile alternative micro-machining technology

Hannes Bleuler, Rolf Wüthrich

2006